In Hungarian the usual phrase is just viszontlátásra "good bye" (shorter/familiar form: viszlát).
If you really want to say "soon" you may add "as soon as possible": a mielőbbi viszontlátásra, or rather use a phrase with találkozunk "we will meet", like még találkozunk "we will meet again" or nemsokára találkozunk "we will meet soon".
-- Olivier

In Korean :
if "soon" is the same day : 이따 봐 (itta bwa)
in other cases (literatly "see you next time") : 다음에 봐 (da-eume bwa)
This is when speaking to a friend, to be more polite you can use 뵈요 (bweyo) instead of 봐
Also in these sentences the "w" is often silent.

"Smoking kills. If you're killed, you've lost a very important part of your life." Brooke Shields

in Portuguese / en portugais:até mais! - the most usual expression. short form of the expression até mais ver!, which is a little less usual. this expression is colloquially pronounced as "teh'mah-is" (without the first "a") ("tè'mays" for French). in a very colloquial level, it's sometimes written as "t+" (the letter t and the math sign +), which, read out loud, has the same sound as the expression.até logo! - it's colloquially pronounced as "teh'logo" ("tè'logou" for French). almost as usual as "até mais".até a vista! - has exactly the same sense as "hasta la vista" in Spanish.